cbs_mpeg2: Correct error codes

Up until now, things that are merely unsupported by cbs_mpeg2 have been
declared to be invalid input. This has been changed.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

1 files changed, 1 insertions, 3 deletions

diff --git a/libavcodec/cbs_mpeg2.c b/libavcodec/cbs_mpeg2.c
index 1f1197fb30..ce22e32c15 100644
--- a/libavcodec/cbs_mpeg2.c
+++ b/libavcodec/cbs_mpeg2.c
@@ -251,9 +251,7 @@ static int cbs_mpeg2_read_unit(CodedBitstreamContext *ctx,
                   group_of_pictures_header, NULL);
 #undef START
         default:
-            av_log(ctx->log_ctx, AV_LOG_ERROR, "Unknown start code %02"PRIx32".\n",
-                   unit->type);
-            return AVERROR_INVALIDDATA;
+            return AVERROR(ENOSYS);
         }
     }